Drill pull



T. N. ROSE RILL PULL not; ma.

Filed May 28. 1932 2 shuts-sheet 1 INVENTOR Touon N. Rose BY ATTORNEYS Oct. 3, 1933.

T. N. ROSE 1,929,332

DRILL PULL Filed May 28, 1932 2 Sheets-Sheet 2 WITNESSES INVENTOR oulon N. Rose ATTORNEYS Patented Oct. 3, 1933 v UNITED] STATES PATEN Toulon N. Rose, Grantwood, N. I. V Application May 28, 1932. Serial No. 614,263

t 2 Claims. (or 254-31) This invention relates to drill pulls and has for an object to provide an improved construction wherein the device may be readily fitted to a drill whichhas become stuck in a stone or other material whereby the device may be caused to function to pull the drill loose. e Another object of the invention is to provide a drill pull forming gripping and pulling means arranged to readily straddle a drill and then function to grip and pull the drill by successive actions to-any desired extent.

A further object, more specifically, is to provide a drill pull for large stone drills/which is formed with a drill straddling member associated with means for preventing spreading thereof, the drill straddling member being also associated with a system'of grips and levers whereby upon the swinging of a given lever a drill will be gripped and then pulled longitudinally a predetermined distance, the structure being such that the parts maybe quicklyswung back'and anothergripping and pulling action secured.

Inthe accompanying drawings,--" Y Figurel is a side view of adrill pull-disclosing an embodiment of the invention, the same being shown in a position ready to pull a which has become stuck in the body of stoneor other material. r Figure 2 isa view similar to Figure l but showing the parts after they have been operated.

shown in Figure 1, the drill being shown in section. Figure 4 is a vertical sectional .view through FigureZ on line 4-4. Q' Figure 5 is a detail fragmentary front view of thedrill-receiving box, certain parts being broken awayfor illustrating the tapering of the dove-tail guides. Fig. 6 is a top plan view of the base; 1 Referring to the accompanying drawings'by numerals,'l indicates a block of stone, cement or the like, into which the drill 2 is being forced in the usual manner. The drill 2 may be three feet long or six or eight feet long, and when it .5 is forced into a stone or other material for substantially its full length, it oftentimes becomes stuck by reason of some fault of the stone. When once it has become stuck, it is very difficult to remove and in many instances it cannot be 15?! removed by the pulling devices now in common use. The drill 2 ordinarily is driven by intermittent blows of a pneumatic hammer or some other device and, consequently, it becomes more or less wedged in place before the operator realizes that the drill is having difficulties. When Figure 3 is a top plan view of the structure once it becomes firmly wedged it requiresa very strong pull to dislodge thesameL In the accompanying drawings one embodiment of theinvem tion is shown which is adapted to grip; a drill under these circumstances and to pullthe same 3 a short distance. This-action may be repeated as many times as desired so that the drill will be intermittently "pulled untilfit is sufficiently loose to be operated by hand a i As shown in the drawings, the drill pullis provided with a base 3 having pairs of upstand-f ing ears 4 and 5 which may be integralwith the base or may be rigidly secured thereto. Preferably, the parts are cast-or otherwise formed in-. tegral so as to receive the lever 6; Thislever 7 2' is provided with an arm 7 whereby it may be moved back and forth. The lever 6 is bifurcated, as shown in Figure 3,'-and the respectiveends 8 I and 9 are fitted into the ears 4 and 5 and journaled therein by the pins 10' and 11. The ends 8 and-9 are each provided with an extension 12, as shown in Figures 1 and 2, said extensions each carrying a pin 12, which extends throughthe respective ends 14 of the'double clevis 15; The

" upper part of the double clevis 15straddles the 8G gripping lever, 16 and is' pivotally connected therewith by a pin 17.

It, willbe understood that the gripping levers 16 and 16 are identical, and also, the respective double clevises 1'5 and associatedparts are ideng 5 tical, so that the'gdescription of one will apply to both. -The. reason thattwojare providedis in ordejrthat the drill 2 maybe gripped on diametrically opposite. sides, asfshown in Figure 4, and. then forced upwardly.

As'illustrated in Figure 4, the gripping lever 16 is 'journaled on the pin 18, which in turn is journaled in a suitable enlargement l9 on the drill-receivingbox 20. This box ispreferably rectangular in cross section, as shown in Figure 95. 3, with one'open side, and is, ireferablmcast'or otherwise formed with rather thick walls. The

open side of this box is provided with inclined dove-tail runways2l and 22 which receive a connecting block 23 having an extension 24 projecting into the opening in the box 20, so that i said opening will be left square in cross section,

as illustrated in Figure 3. The connecting block 23 is removed when it is desired to use the device, and after it is removed, the lever 6 is 1 5 moved to the position shown in Figure '1, and then the devicev is moved to straddle the drillv 2. After this has been done, the connecting block 23 is slid into place so'as'to prevent any spreading of the box 20. Then the arm '1 is swung 1 7 may be done quickly 1 this movement is stance, from one-half inch to one inch, but by swinging the 'arm 7 back to the position shown in Figure l, and then upwardly again, tli'egripping levers will be released, move downwardly, grip at the lower position and then move upwardly again so as to give another pull to the drill. In this way by moving the arm 7 back and forth, the device will intermittently grip the drill and-will step by step pull the same. Ordinarily, after the drill has been pulled for a few inches or even less,= it is sufficiently loose to be removed manually. This pulling action, asjust described,;will not injure the drill and at any time. .After the drill has been released it may be moved out of the hole and used somewhere else or may be again used in the same hole, 7 g I v The movement of the respective double clevises 15 are substantially in a straight line while the extensions 12 move through a very small are. As the double clevises are swingably mounted on the extensions 12, and the clampinglevers are at right angles with just described may readily take place. The eX- tensions 12 are each provided with a slot 12' for accommodating the respective journal pins 12" so that there will be no pinching action as the lever 6 moves from the position shown in Figure 1 to that shown in Figure 2. J

In operation, when a drill becomes stuck and it is desired to remove the same, the connecting block 23 is removed and the device is slid into the position shown in Figure 1. replaced and the lever 6 swung downwardly to the position shown in 'Figure 2. The first part of the swinging movement causes the gripping levers'16 and 16' to function and then the remaining part moves the box and associated parts in,- cluding'the drill 2 upwardlyqa short distance. The lever 6 is then swung back until the parts again assumethe position shown in Figure 1. If the drill is sufficientlylose by this one operation, the device is removed from the drill, but if the drill is not sufiiciently loose, this operation is repeated a second or more times. After the drill has become sufliciently loose, the connecting block 23 is slidofl' of its guides 21 and 22, and then the device movedat right angles away from the drill,

after which the block 23 is replaced and the deusually very small, as, for in each other, the swinging action The block 23 is then provided with a pair of vice set to one side until it is again needed. In this way, a stuck drill may be quickly released and the drilling operation continued, or the drill used some other place. It will be noted that there is no damage done to the drill and when it is removed it is as straight as it was before thedevice was operated.

I claim:-

1. A drill pull includinga base having a notch extending from one side whereby the base may be slid so as to straddle a drill, said base being apertured ears at each end, a lifting box open at one side fitting around the innerend of said notch whereby the lifting box may straddle a drill when the base is slid to straddle a drill, a pair of diametrically oppositely positioned gripping and lifting levers carried by said lifting box and positioned to grip and lift the drill extending through said box, a lever having a bifurcated end positioned to have the bifurcated end extend between the respective-pairs of ears on said base, pins for pivotally connecting said bifurcated members'to the ears, each arm of the bifurcated members having an extension, and a member pivotally mounted to the upper bifurcated I end .fitting between] the respective pairs of ears," a pivotal pin extending through eachppair of ears and through .said arms for pivotally connecting'thearmsjeach of said arms having an extension, adouble clevis for each of saidarms, each clevis having a bifurcated portion straddling the respective extensionsand a bifurcatediportion at. right angles.tc' ,.,th'e first men tionedbifurcated portion, a gripping .lever for each of said double clevises extending into the last. mentioned. bifurcated portion thereof; pins for pivotally connecting the gripping levers to the respective doubleclevises, a substantially U- shap'ed lifting box, a pin. extending through each of said gripping'levers and through'part of said box for pivotally connecting .the levers to the box, each of said levers havinga' gifippiiigface formed onanarc, which. is eccentric to-the'members whichpivotally mount the gripping levers, a nd means removably connected to said box for preventing spreading thereof levers function. I l TOULON N. ROSE;

a ,handope'rated lever having-a bifurcated. end, the respective arms of the when said gripping 

